I had trouble with the zsh.exe crashes problem too. The problem is that zsh is a port of a BSD Unix utility to Windows, so it is kind of buggy. To fix this error, go into "C:\Program Files\Yahoo!\Widgets\UnixUtilities\bin" (without the quotes), delete the zsh.exe. Now make a copy of sh.exe in the same directory, rename it to zsh.exe, reset the widget, and presto! It Works!